Composition for bearings



' UNITED STATES PATENT OFFI JOHN F. NEWELL, OF GARDINER, MAINE.

COMPOSITION FOR BEARINGS.

SlPECIFfGA'IION forming part of Letters Patent No. 494,156, dated March 28, 1893.

Application and March 26, 1 92. set-1n No. 426,696. (No specimens To all whom it may concern.-

zen of the United States of America, and a resident of the city of Gardiner, in the county of Kennebcc and State of Maine, have invented a certain new and useful Improved Composition for Bearings of Journals, Spindles, &e.,- of which the following is afull,clear, and exact description.

Be it known that I, J OHN F. NEWELL, a citi- M y invention relates toan improve insulin the composition of materials produced from colnniinuted plumbago, or graphite, and sundr y ilberamlnerals and oils, suitable for all frictional bearings such as bearings for journals, splndles, shafts, &e., and which not only shall be anti frictional and a lubricant to the highest degree but also shall be most solid, compact, hard and durable. l

To the end stated, this invention consists in a compound of plumba o, in a connnlnuted form, a fibrous substance preferably jute or linen pulp, white lead, red lead and linseed oil severally in the proportions and mixed and molded and otherwise prepared in the manner all substantially as hereinafter described.

A preferable compounding of the substances named is as follows :-Iluinbago, com minuted, three parts; fibrous substance, three parts;

. white lead,one part; rod lead, two parts; and

linseed oil in sullicicnt quantity, as hereinat'ter appears. The invention however is not to be limited to those proportions.

The combined plumbago and fibrous substancc(a jute fiber being preferable)- should, for the best; rcsults,cach be finclydividcd,and the plumbago in a pure condition, and they are, with the aid of water, thoroughly mixed and incorporated with each other and thus the particles of plnmbago are intimately associated with and held by the 'libcrs. The two loads are mixed with the linseed oil which is in sufiicient quantity to reduce thewhole to a. more or-lessliquid condition and then the mixture of. the leads and linseed oil and the mixture of the plumbago and fibrous'substance are'thoroughly mixed with each other, and the whole molded, un-

der sufficient pressure to shape and to express thewater, it is then dried until it is in a more orless tacky condition when it is again molded under a second and much heavier pressure and thereby rendered compact and hard and then finally dried under heat, the result being a most solid, compact and practically.

homogeneous molded form of plumbago permeated throughout with fiber and 'thelea ds and oil. The fibrous substance intimately connected with the particlesof plnmb'ago acts as a binder for the whole mass, while the red nals, spindles, shafts, &c., which, in the highest and white leads, and oil cementthe fibersand---6oparticles of plumbago togetherand seeuregreat hardness, solidity and compactness to a the whole molded mass, and thus is prodn ced ,1

a bearing for frictional surfaces such'as fourdegree, is anti-frictional and lubricant as also strong and durable, I Having thus'described my invention, what I claim, and desire to secure by Letters Pata 7 A molded and hardened composition of I 'matter for bearings, 350., and consisting-of cut, is

plumbago, fibrous substance, red'lead, white 7 scribed.

load and a drying oil, substantially asne In testimony whereof I have hereunto setf my hand in the presence of two subscribing witnesses. JOHN F. NEWELL. Witnesses:

llonnn'r Ruumnns, AMASA It. "ARMUN. 

